2 This file is part of GNUnet
3 (C) 2008, 2009 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file include/gnunet_testing_lib.h
23 * @brief convenience API for writing testcases for GNUnet
24 * Many testcases need to start and stop gnunetd,
25 * and this library is supposed to make that easier
26 * for TESTCASES. Normal programs should always
27 * use functions from gnunet_{util,arm}_lib.h. This API is
28 * ONLY for writing testcases!
29 * @author Christian Grothoff
32 #ifndef GNUNET_TESTING_LIB_H
33 #define GNUNET_TESTING_LIB_H
35 #include "gnunet_util_lib.h"
36 #include "gnunet_statistics_service.h"
41 #if 0 /* keep Emacsens' auto-indent happy */
46 #define HOSTKEYFILESIZE 914
49 * Handle for a GNUnet daemon (technically a set of
50 * daemons; the handle is really for the master ARM
51 * daemon) started by the testing library.
53 struct GNUNET_TESTING_Daemon;
56 * Linked list of hostnames and ports to use for starting daemons.
58 struct GNUNET_TESTING_Host
61 * Pointer to next item in the list.
63 struct GNUNET_TESTING_Host *next;
66 * Hostname to connect to.
71 * Username to use when connecting (may be null).
76 * Port to use for SSH connection (used for ssh
77 * connection forwarding, 0 to let ssh decide)
83 * Prototype of a function that will be called whenever
84 * a daemon was started by the testing library.
87 * @param id identifier for the daemon, NULL on error
88 * @param d handle for the daemon
89 * @param emsg error message (NULL on success)
91 typedef void (*GNUNET_TESTING_NotifyHostkeyCreated) (void *cls,
93 GNUNET_PeerIdentity * id,
95 GNUNET_TESTING_Daemon * d,
99 * Prototype of a function that will be called whenever
100 * a daemon was started by the testing library.
103 * @param id identifier for the daemon, NULL on error
104 * @param cfg configuration used by this daemon
105 * @param d handle for the daemon
106 * @param emsg error message (NULL on success)
108 typedef void (*GNUNET_TESTING_NotifyDaemonRunning) (void *cls,
110 GNUNET_PeerIdentity * id,
112 GNUNET_CONFIGURATION_Handle
114 struct GNUNET_TESTING_Daemon
115 * d, const char *emsg);
119 * Handle to an entire testbed of GNUnet peers.
121 struct GNUNET_TESTING_Testbed;
124 * Phases of starting GNUnet on a system.
126 enum GNUNET_TESTING_StartPhase
129 * Copy the configuration file to the target system.
134 * Configuration file has been copied, generate hostkey.
139 * Create the hostkey for the peer.
144 * Hostkey generated, wait for topology to be finished.
149 * Topology has been created, now start ARM.
154 * ARM has been started, check that it has properly daemonized and
155 * then try to connect to the CORE service (which should be
156 * auto-started by ARM).
161 * We're waiting for CORE to start.
166 * CORE is up, now make sure we get the HELLO for this peer.
171 * Core has notified us that we've established a connection to the service.
172 * The main FSM halts here and waits to be moved to UPDATE or CLEANUP.
177 * We've been asked to terminate the instance and are now waiting for
178 * the remote command to stop the gnunet-arm process and delete temporary
184 * We should shutdown a *single* service via gnunet-arm. Call the dead_cb
185 * upon notification from gnunet-arm that the service has been stopped.
187 SP_SERVICE_SHUTDOWN_START,
190 * We should start a *single* service via gnunet-arm. Call the daemon cb
191 * upon notification from gnunet-arm that the service has been started.
196 * We've received a configuration update and are currently waiting for
197 * the copy process for the update to complete. Once it is, we will
198 * return to "SP_START_DONE" (and rely on ARM to restart all affected
205 * Prototype of a function that will be called when a
206 * particular operation was completed the testing library.
209 * @param emsg NULL on success
211 typedef void (*GNUNET_TESTING_NotifyCompletion) (void *cls, const char *emsg);
214 * Prototype of a function that will be called with the
215 * number of connections created for a particular topology.
218 * @param num_connections the number of connections created
220 typedef void (*GNUNET_TESTING_NotifyConnections) (void *cls,
221 unsigned int num_connections);
224 * Handle for a GNUnet daemon (technically a set of
225 * daemons; the handle is really for the master ARM
226 * daemon) started by the testing library.
228 struct GNUNET_TESTING_Daemon
233 struct GNUNET_CONFIGURATION_Handle *cfg;
236 * At what time to give up starting the peer
238 struct GNUNET_TIME_Absolute max_timeout;
241 * Host to run GNUnet on.
246 * Port to use for ssh, NULL to let system choose default.
251 * Result of GNUNET_i2s of this peer,
257 * Username we are using.
262 * Name of the configuration file
267 * Callback to inform initiator that the peer's
268 * hostkey has been created.
270 GNUNET_TESTING_NotifyHostkeyCreated hostkey_callback;
273 * Closure for hostkey creation callback.
278 * Function to call when the peer is running.
280 GNUNET_TESTING_NotifyDaemonRunning cb;
288 * Arguments from "daemon_stop" call.
290 GNUNET_TESTING_NotifyCompletion dead_cb;
293 * Closure for 'dead_cb'.
298 * Arguments from "daemon_stop" call.
300 GNUNET_TESTING_NotifyCompletion update_cb;
303 * Closure for 'update_cb'.
308 * Identity of this peer (once started).
310 struct GNUNET_PeerIdentity id;
313 * Flag to indicate that we've already been asked
314 * to terminate (but could not because some action
315 * was still pending).
320 * GNUNET_YES if the hostkey has been created
321 * for this peer, GNUNET_NO otherwise.
326 * PID of the process that we started last.
328 struct GNUNET_OS_Process *proc;
331 * In which phase are we during the start of
334 enum GNUNET_TESTING_StartPhase phase;
337 * ID of the current task.
339 GNUNET_SCHEDULER_TaskIdentifier task;
342 * Handle to the server.
344 struct GNUNET_CORE_Handle *server;
347 * Handle to the transport service of this peer
349 struct GNUNET_TRANSPORT_Handle *th;
352 * HELLO message for this peer
354 struct GNUNET_HELLO_Message *hello;
357 * Handle to a pipe for reading the hostkey.
359 struct GNUNET_DISK_PipeHandle *pipe_stdout;
362 * Output from gnunet-peerinfo is read into this buffer.
364 char hostkeybuf[105];
367 * Current position in 'hostkeybuf' (for reading from gnunet-peerinfo)
369 unsigned int hostkeybufpos;
372 * Set to GNUNET_YES once the peer is up.
377 * Used to tell shutdown not to remove configuration for the peer
378 * (if it's going to be restarted later)
383 * Currently, a single char * pointing to a service
384 * that has been churned off.
386 * FIXME: make this a linked list of services that have been churned off!!!
388 char *churned_services;
393 * Handle to a group of GNUnet peers.
395 struct GNUNET_TESTING_PeerGroup;
399 * Prototype of a function that will be called whenever
400 * two daemons are connected by the testing library.
403 * @param first peer id for first daemon
404 * @param second peer id for the second daemon
405 * @param distance distance between the connected peers
406 * @param first_cfg config for the first daemon
407 * @param second_cfg config for the second daemon
408 * @param first_daemon handle for the first daemon
409 * @param second_daemon handle for the second daemon
410 * @param emsg error message (NULL on success)
412 typedef void (*GNUNET_TESTING_NotifyConnection) (void *cls,
414 GNUNET_PeerIdentity * first,
416 GNUNET_PeerIdentity * second,
419 GNUNET_CONFIGURATION_Handle *
422 GNUNET_CONFIGURATION_Handle *
424 struct GNUNET_TESTING_Daemon *
426 struct GNUNET_TESTING_Daemon *
431 * Prototype of a callback function indicating that two peers
432 * are currently connected.
435 * @param first peer id for first daemon
436 * @param second peer id for the second daemon
437 * @param distance distance between the connected peers
438 * @param emsg error message (NULL on success)
440 typedef void (*GNUNET_TESTING_NotifyTopology) (void *cls,
441 const struct GNUNET_PeerIdentity
443 const struct GNUNET_PeerIdentity
444 * second, const char *emsg);
447 * Starts a GNUnet daemon. GNUnet must be installed on the target
448 * system and available in the PATH. The machine must furthermore be
449 * reachable via "ssh" (unless the hostname is "NULL") without the
450 * need to enter a password.
452 * @param cfg configuration to use
453 * @param timeout how long to wait starting up peers
454 * @param pretend GNUNET_YES to set up files but not start peer GNUNET_NO
455 * to really start the peer (default)
456 * @param hostname name of the machine where to run GNUnet
457 * (use NULL for localhost).
458 * @param ssh_username ssh username to use when connecting to hostname
459 * @param sshport port to pass to ssh process when connecting to hostname
460 * @param hostkey pointer to a hostkey to be written to disk (instead of being generated)
461 * @param hostkey_callback function to call once the hostkey has been
462 * generated for this peer, but it hasn't yet been started
463 * (NULL to start immediately, otherwise waits on GNUNET_TESTING_daemon_continue_start)
464 * @param hostkey_cls closure for hostkey callback
465 * @param cb function to call once peer is up, or failed to start
466 * @param cb_cls closure for cb
467 * @return handle to the daemon (actual start will be completed asynchronously)
469 struct GNUNET_TESTING_Daemon *GNUNET_TESTING_daemon_start (const struct
470 GNUNET_CONFIGURATION_Handle
474 timeout, int pretend,
475 const char *hostname,
480 GNUNET_TESTING_NotifyHostkeyCreated
483 GNUNET_TESTING_NotifyDaemonRunning
487 * Continues GNUnet daemon startup when user wanted to be notified
488 * once a hostkey was generated (for creating friends files, blacklists,
491 * @param daemon the daemon to finish starting
493 void GNUNET_TESTING_daemon_continue_startup (struct GNUNET_TESTING_Daemon
497 * Check whether the given daemon is running.
499 * @param daemon the daemon to check
501 * @return GNUNET_YES if the daemon is up, GNUNET_NO if the
502 * daemon is down, GNUNET_SYSERR on error.
504 int GNUNET_TESTING_daemon_running (struct GNUNET_TESTING_Daemon *daemon);
507 * Restart (stop and start) a GNUnet daemon.
509 * @param d the daemon that should be restarted
510 * @param cb function called once the daemon is (re)started
511 * @param cb_cls closure for cb
513 void GNUNET_TESTING_daemon_restart (struct GNUNET_TESTING_Daemon *d,
514 GNUNET_TESTING_NotifyDaemonRunning cb,
518 * Start a peer that has previously been stopped using the daemon_stop
519 * call (and files weren't deleted and the allow restart flag)
521 * @param daemon the daemon to start (has been previously stopped)
522 * @param timeout how long to wait for restart
523 * @param cb the callback for notification when the peer is running
524 * @param cb_cls closure for the callback
526 void GNUNET_TESTING_daemon_start_stopped (struct GNUNET_TESTING_Daemon *daemon,
527 struct GNUNET_TIME_Relative timeout,
528 GNUNET_TESTING_NotifyDaemonRunning cb,
532 * Starts a GNUnet daemon's service.
534 * @param d the daemon for which the service should be started
535 * @param service the name of the service to start
536 * @param timeout how long to wait for process for startup
537 * @param cb function called once gnunet-arm returns
538 * @param cb_cls closure for cb
540 void GNUNET_TESTING_daemon_start_service (struct GNUNET_TESTING_Daemon *d,
542 struct GNUNET_TIME_Relative timeout,
543 GNUNET_TESTING_NotifyDaemonRunning cb,
547 * Starts a GNUnet daemon's service which has been previously turned off.
549 * @param d the daemon for which the service should be started
550 * @param service the name of the service to start
551 * @param timeout how long to wait for process for startup
552 * @param cb function called once gnunet-arm returns
553 * @param cb_cls closure for cb
555 void GNUNET_TESTING_daemon_start_stopped_service (struct GNUNET_TESTING_Daemon
557 struct GNUNET_TIME_Relative
559 GNUNET_TESTING_NotifyDaemonRunning
563 * Get a certain testing daemon handle.
565 * @param pg handle to the set of running peers
566 * @param position the number of the peer to return
568 struct GNUNET_TESTING_Daemon *GNUNET_TESTING_daemon_get (struct
569 GNUNET_TESTING_PeerGroup
571 unsigned int position);
574 * Get a daemon by peer identity, so callers can
575 * retrieve the daemon without knowing it's offset.
577 * @param pg the peer group to retrieve the daemon from
578 * @param peer_id the peer identity of the daemon to retrieve
580 * @return the daemon on success, or NULL if no such peer identity is found
582 struct GNUNET_TESTING_Daemon *GNUNET_TESTING_daemon_get_by_id (struct
583 GNUNET_TESTING_PeerGroup
590 * Stops a GNUnet daemon.
592 * @param d the daemon that should be stopped
593 * @param timeout how long to wait for process for shutdown to complete
594 * @param cb function called once the daemon was stopped
595 * @param cb_cls closure for cb
596 * @param delete_files GNUNET_YES to remove files, GNUNET_NO
597 * to leave them (i.e. for restarting at a later time,
598 * or logfile inspection once finished)
599 * @param allow_restart GNUNET_YES to restart peer later (using this API)
600 * GNUNET_NO to kill off and clean up for good
602 void GNUNET_TESTING_daemon_stop (struct GNUNET_TESTING_Daemon *d,
603 struct GNUNET_TIME_Relative timeout,
604 GNUNET_TESTING_NotifyCompletion cb,
605 void *cb_cls, int delete_files,
610 * Changes the configuration of a GNUnet daemon.
612 * @param d the daemon that should be modified
613 * @param cfg the new configuration for the daemon
614 * @param cb function called once the configuration was changed
615 * @param cb_cls closure for cb
617 void GNUNET_TESTING_daemon_reconfigure (struct GNUNET_TESTING_Daemon *d,
618 struct GNUNET_CONFIGURATION_Handle *cfg,
619 GNUNET_TESTING_NotifyCompletion cb,
623 * Stops a single service of a GNUnet daemon. Used like daemon_stop,
624 * only doesn't stop the entire peer in any case. If the service
625 * is not currently running, this call is likely to fail after
628 * @param d the daemon that should be stopped
629 * @param service the name of the service to stop
630 * @param timeout how long to wait for process for shutdown to complete
631 * @param cb function called once the service was stopped
632 * @param cb_cls closure for cb
634 void GNUNET_TESTING_daemon_stop_service (struct GNUNET_TESTING_Daemon *d,
636 struct GNUNET_TIME_Relative timeout,
637 GNUNET_TESTING_NotifyCompletion cb,
641 * Read a testing hosts file based on a configuration.
642 * Returns a DLL of hosts (caller must free!) on success
643 * or NULL on failure.
645 * @param cfg a configuration with a testing section
647 * @return DLL of hosts on success, NULL on failure
649 struct GNUNET_TESTING_Host *GNUNET_TESTING_hosts_load (const struct
650 GNUNET_CONFIGURATION_Handle
655 * Start count gnunet instances with the same set of transports and
656 * applications. The port numbers (any option called "PORT") will be
657 * adjusted to ensure that no two peers running on the same system
658 * have the same port(s) in their respective configurations.
660 * @param cfg configuration template to use
661 * @param total number of daemons to start
662 * @param max_concurrent_connections for testing, how many peers can
663 * we connect to simultaneously
664 * @param max_concurrent_ssh when starting with ssh, how many ssh
665 * connections will we allow at once (based on remote hosts allowed!)
666 * @param timeout total time allowed for peers to start
667 * @param hostkey_callback function to call on each peers hostkey generation
668 * if NULL, peers will be started by this call, if non-null,
669 * GNUNET_TESTING_daemons_continue_startup must be called after
670 * successful hostkey generation
671 * @param hostkey_cls closure for hostkey callback
672 * @param cb function to call on each daemon that was started
673 * @param cb_cls closure for cb
674 * @param connect_callback function to call each time two hosts are connected
675 * @param connect_callback_cls closure for connect_callback
676 * @param hostnames linked list of host structs to use to start peers on
677 * (NULL to run on localhost only)
679 * @return NULL on error, otherwise handle to control peer group
681 struct GNUNET_TESTING_PeerGroup *GNUNET_TESTING_daemons_start (const struct
682 GNUNET_CONFIGURATION_Handle
687 max_concurrent_connections,
693 GNUNET_TESTING_NotifyHostkeyCreated
697 GNUNET_TESTING_NotifyDaemonRunning
699 GNUNET_TESTING_NotifyConnection
702 *connect_callback_cls,
708 * Function which continues a peer group starting up
709 * after successfully generating hostkeys for each peer.
711 * @param pg the peer group to continue starting
713 void GNUNET_TESTING_daemons_continue_startup (struct GNUNET_TESTING_PeerGroup
718 * Establish a connection between two GNUnet daemons.
720 * @param d1 handle for the first daemon
721 * @param d2 handle for the second daemon
722 * @param timeout how long is the connection attempt
724 * @param max_connect_attempts how many times should we try to reconnect
726 * @param send_hello GNUNET_YES to send the HELLO, GNUNET_NO to assume
727 * the HELLO has already been exchanged
728 * @param cb function to call at the end
729 * @param cb_cls closure for cb
731 void GNUNET_TESTING_daemons_connect (struct GNUNET_TESTING_Daemon *d1,
732 struct GNUNET_TESTING_Daemon *d2,
733 struct GNUNET_TIME_Relative timeout,
734 unsigned int max_connect_attempts,
736 GNUNET_TESTING_NotifyConnection cb,
741 * Restart all peers in the given group.
743 * @param pg the handle to the peer group
744 * @param callback function to call on completion (or failure)
745 * @param callback_cls closure for the callback function
747 void GNUNET_TESTING_daemons_restart (struct GNUNET_TESTING_PeerGroup *pg,
748 GNUNET_TESTING_NotifyCompletion callback,
753 * Shutdown all peers started in the given group.
755 * @param pg handle to the peer group
756 * @param timeout how long to wait for shutdown
757 * @param cb callback to notify upon success or failure
758 * @param cb_cls closure for cb
760 void GNUNET_TESTING_daemons_stop (struct GNUNET_TESTING_PeerGroup *pg,
761 struct GNUNET_TIME_Relative timeout,
762 GNUNET_TESTING_NotifyCompletion cb,
767 * Count the number of running peers.
769 * @param pg handle for the peer group
771 * @return the number of currently running peers in the peer group
773 unsigned int GNUNET_TESTING_daemons_running (struct GNUNET_TESTING_PeerGroup
777 * Simulate churn by stopping some peers (and possibly
778 * re-starting others if churn is called multiple times). This
779 * function can only be used to create leave-join churn (peers "never"
780 * leave for good). First "voff" random peers that are currently
781 * online will be taken offline; then "von" random peers that are then
782 * offline will be put back online. No notifications will be
783 * generated for any of these operations except for the callback upon
784 * completion. Note that the implementation is at liberty to keep
785 * the ARM service itself (but none of the other services or daemons)
786 * running even though the "peer" is being varied offline.
788 * @param pg handle for the peer group
789 * @param service the service to churn on/off, NULL for all
790 * @param voff number of peers that should go offline
791 * @param von number of peers that should come back online;
792 * must be zero on first call (since "testbed_start"
793 * always starts all of the peers)
794 * @param timeout how long to wait for operations to finish before
796 * @param cb function to call at the end
797 * @param cb_cls closure for cb
799 void GNUNET_TESTING_daemons_churn (struct GNUNET_TESTING_PeerGroup *pg,
800 char *service, unsigned int voff,
802 struct GNUNET_TIME_Relative timeout,
803 GNUNET_TESTING_NotifyCompletion cb,
806 * Start a given service for each of the peers in the peer group.
808 * @param pg handle for the peer group
809 * @param service the service to start
810 * @param timeout how long to wait for operations to finish before
812 * @param cb function to call once finished
813 * @param cb_cls closure for cb
816 void GNUNET_TESTING_daemons_start_service (struct GNUNET_TESTING_PeerGroup *pg,
818 struct GNUNET_TIME_Relative timeout,
819 GNUNET_TESTING_NotifyCompletion cb,
823 * Callback function to process statistic values.
826 * @param peer the peer the statistics belong to
827 * @param subsystem name of subsystem that created the statistic
828 * @param name the name of the datum
829 * @param value the current value
830 * @param is_persistent GNUNET_YES if the value is persistent, GNUNET_NO if not
831 * @return GNUNET_OK to continue, GNUNET_SYSERR to abort iteration
833 typedef int (*GNUNET_TESTING_STATISTICS_Iterator) (void *cls,
835 GNUNET_PeerIdentity * peer,
836 const char *subsystem,
842 * Iterate over all (running) peers in the peer group, retrieve
843 * all statistics from each.
845 * @param pg the peergroup to iterate statistics of
846 * @param cont continuation to call once call is completed(?)
847 * @param proc processing function for each statistic retrieved
848 * @param cls closure to pass to proc
850 void GNUNET_TESTING_get_statistics (struct GNUNET_TESTING_PeerGroup *pg,
851 GNUNET_STATISTICS_Callback cont,
852 GNUNET_TESTING_STATISTICS_Iterator proc,
856 * Topologies supported for testbeds.
858 enum GNUNET_TESTING_Topology
861 * A clique (everyone connected to everyone else).
863 GNUNET_TESTING_TOPOLOGY_CLIQUE,
866 * Small-world network (2d torus plus random links).
868 GNUNET_TESTING_TOPOLOGY_SMALL_WORLD,
871 * Small-world network (ring plus random links).
873 GNUNET_TESTING_TOPOLOGY_SMALL_WORLD_RING,
878 GNUNET_TESTING_TOPOLOGY_RING,
883 GNUNET_TESTING_TOPOLOGY_2D_TORUS,
888 GNUNET_TESTING_TOPOLOGY_ERDOS_RENYI,
891 * Certain percentage of peers are unable to communicate directly
892 * replicating NAT conditions
894 GNUNET_TESTING_TOPOLOGY_INTERNAT,
897 * Scale free topology.
899 GNUNET_TESTING_TOPOLOGY_SCALE_FREE,
902 * Straight line topology.
904 GNUNET_TESTING_TOPOLOGY_LINE,
907 * All peers are disconnected.
909 GNUNET_TESTING_TOPOLOGY_NONE,
912 * Read a topology from a given file.
914 GNUNET_TESTING_TOPOLOGY_FROM_FILE
918 * Options for connecting a topology.
920 enum GNUNET_TESTING_TopologyOption
923 * Try to connect all peers specified in the topology.
925 GNUNET_TESTING_TOPOLOGY_OPTION_ALL,
928 * Choose a random subset of connections to create.
930 GNUNET_TESTING_TOPOLOGY_OPTION_RANDOM,
933 * Create at least X connections for each peer.
935 GNUNET_TESTING_TOPOLOGY_OPTION_MINIMUM,
938 * Using a depth first search, create one connection
939 * per peer. If any are missed (graph disconnected)
940 * start over at those peers until all have at least one
943 GNUNET_TESTING_TOPOLOGY_OPTION_DFS,
946 * Find the N closest peers to each allowed peer in the
947 * topology and make sure a connection to those peers
948 * exists in the connect topology.
950 GNUNET_TESTING_TOPOLOGY_OPTION_ADD_CLOSEST,
953 * No options specified.
955 GNUNET_TESTING_TOPOLOGY_OPTION_NONE
960 * Get a topology from a string input.
962 * @param topology where to write the retrieved topology
963 * @param topology_string The string to attempt to
964 * get a configuration value from
965 * @return GNUNET_YES if topology string matched a
966 * known topology, GNUNET_NO if not
968 int GNUNET_TESTING_topology_get (enum GNUNET_TESTING_Topology *topology,
969 const char *topology_string);
972 * Get connect topology option from string input.
974 * @param topology_option where to write the retrieved topology
975 * @param topology_string The string to attempt to
976 * get a configuration value from
977 * @return GNUNET_YES if topology string matched a
978 * known topology, GNUNET_NO if not
980 int GNUNET_TESTING_topology_option_get (enum GNUNET_TESTING_TopologyOption
982 const char *topology_string);
986 * Takes a peer group and creates a topology based on the
987 * one specified. Creates a topology means generates friend
988 * files for the peers so they can only connect to those allowed
989 * by the topology. This will only have an effect once peers
990 * are started if the FRIENDS_ONLY option is set in the base
993 * Also takes an optional restrict topology which
994 * disallows direct connections UNLESS they are specified in
995 * the restricted topology.
997 * A simple example; if the topology option is set to LINE
998 * peers can ONLY connect in a LINE. However, if the topology
999 * option is set to 2D-torus and the restrict option is set to
1000 * line with restrict_transports equal to "tcp udp", then peers
1001 * may connect in a 2D-torus, but will be restricted to tcp and
1002 * udp connections only in a LINE. Generally it only makes
1003 * sense to do this if restrict_topology is a subset of topology.
1005 * For testing peer discovery, etc. it is generally better to
1006 * leave restrict_topology as GNUNET_TESTING_TOPOLOGY_NONE and
1007 * then use the connect_topology function to restrict the initial
1010 * @param pg the peer group struct representing the running peers
1011 * @param topology which topology to connect the peers in
1012 * @param restrict_topology allow only direct connections in this topology,
1013 * based on those listed in restrict_transports, set to
1014 * GNUNET_TESTING_TOPOLOGY_NONE for no restrictions
1015 * @param restrict_transports space delimited list of transports to blacklist
1016 * to create restricted topology, NULL for none
1018 * @return the maximum number of connections were all allowed peers
1019 * connected to each other
1021 unsigned int GNUNET_TESTING_create_topology (struct GNUNET_TESTING_PeerGroup
1023 enum GNUNET_TESTING_Topology
1025 enum GNUNET_TESTING_Topology
1027 const char *restrict_transports);
1030 * Iterate over all (running) peers in the peer group, retrieve
1031 * all connections that each currently has.
1033 * @param pg the peer group we are concerned with
1034 * @param cb callback for topology information
1035 * @param cls closure for callback
1037 void GNUNET_TESTING_get_topology (struct GNUNET_TESTING_PeerGroup *pg,
1038 GNUNET_TESTING_NotifyTopology cb, void *cls);
1041 * Stop the connection process temporarily.
1043 * @param pg the peer group to stop connecting
1045 void GNUNET_TESTING_stop_connections (struct GNUNET_TESTING_PeerGroup *pg);
1048 * Resume the connection process.
1050 * @param pg the peer group to resume connecting
1052 void GNUNET_TESTING_resume_connections (struct GNUNET_TESTING_PeerGroup *pg);
1055 * There are many ways to connect peers that are supported by this function.
1056 * To connect peers in the same topology that was created via the
1057 * GNUNET_TESTING_create_topology, the topology variable must be set to
1058 * GNUNET_TESTING_TOPOLOGY_NONE. If the topology variable is specified,
1059 * a new instance of that topology will be generated and attempted to be
1060 * connected. This could result in some connections being impossible,
1061 * because some topologies are non-deterministic.
1063 * @param pg the peer group struct representing the running peers
1064 * @param topology which topology to connect the peers in
1065 * @param options options for connecting the topology
1066 * @param option_modifier modifier for options that take a parameter
1067 * @param connect_timeout how long to wait before giving up on connecting
1069 * @param connect_attempts how many times to attempt to connect two peers
1070 * over the connect_timeout duration
1071 * @param notify_callback notification to be called once all connections completed
1072 * @param notify_cls closure for notification callback
1074 * @return the number of connections that will be attempted, GNUNET_SYSERR on error
1076 int GNUNET_TESTING_connect_topology (struct GNUNET_TESTING_PeerGroup *pg,
1077 enum GNUNET_TESTING_Topology topology,
1078 enum GNUNET_TESTING_TopologyOption options,
1079 double option_modifier,
1080 struct GNUNET_TIME_Relative
1082 unsigned int connect_attempts,
1083 GNUNET_TESTING_NotifyCompletion
1084 notify_callback, void *notify_cls);
1087 * Start or stop an individual peer from the given group.
1089 * @param pg handle to the peer group
1090 * @param offset which peer to start or stop
1091 * @param desired_status GNUNET_YES to have it running, GNUNET_NO to stop it
1092 * @param timeout how long to wait for shutdown
1093 * @param cb function to call at the end
1094 * @param cb_cls closure for cb
1096 void GNUNET_TESTING_daemons_vary (struct GNUNET_TESTING_PeerGroup *pg,
1097 unsigned int offset, int desired_status,
1098 struct GNUNET_TIME_Relative timeout,
1099 GNUNET_TESTING_NotifyCompletion cb,
1103 * Start a peer group with a given number of peers. Notify
1104 * on completion of peer startup and connection based on given
1105 * topological constraints. Optionally notify on each
1106 * established connection.
1108 * @param cfg configuration template to use
1109 * @param total number of daemons to start
1110 * @param timeout total time allowed for peers to start
1111 * @param connect_cb function to call each time two daemons are connected
1112 * @param peergroup_cb function to call once all peers are up and connected
1113 * @param peergroup_cls closure for peergroup callbacks
1114 * @param hostnames linked list of host structs to use to start peers on
1115 * (NULL to run on localhost only)
1117 * @return NULL on error, otherwise handle to control peer group
1119 struct GNUNET_TESTING_PeerGroup *GNUNET_TESTING_peergroup_start (const struct
1120 GNUNET_CONFIGURATION_Handle
1125 GNUNET_TIME_Relative
1127 GNUNET_TESTING_NotifyConnection
1129 GNUNET_TESTING_NotifyCompletion
1138 * Print current topology to a graphviz readable file.
1140 * @param pg a currently running peergroup to print to file
1141 * @param output_filename the file to write the topology to
1142 * @param notify_cb callback to call upon completion or failure
1143 * @param notify_cb_cls closure for notify_cb
1146 void GNUNET_TESTING_peergroup_topology_to_file (struct GNUNET_TESTING_PeerGroup
1148 const char *output_filename,
1149 GNUNET_TESTING_NotifyCompletion
1150 notify_cb, void *notify_cb_cls);
1153 #if 0 /* keep Emacsens' auto-indent happy */